Elevated blood lead levels of refugee children in the United States: a systematic review of recent literature (2011-2021).

Lead is an environmental hazard; even small elevations in blood lead level can cause serious negative health effects in children, including irreversible impacts such as learning difficulties, attention disorders, and behavioral issues. Previous research has shown that some groups are at higher risk for lead poisoning including racial/ethnic minorities, those with low economic status, and immigrants, especially refugees. This systematic review explores recent literature studying disparities in lead poisoning in refugee children. Search terms were chosen with the assistance of a medical librarian, and two independent reviewers assessed articles using a PICOS criteria (Population, Intervention, Comparison, Outcome, Study Design) following the Preferred Reporting Items for Systematic review and Meta-Analysis Protocols (PRIMSA-P) guidelines, a set of evidence-based minimum standards for reporting in systematic reviews. 321 article titles were reviewed, 61 abstracts screened, and 17 methods sections reviewed, ultimately including 13 studies. The studies found a high prevalence of elevated blood lead level among refugee populations when compared to reference populations. Both pre-migration and post-migration factors were identified as contributors to the disparity, and associations were identified between elevated blood lead levels and factors such as country of origin, age, and other health variables. Health providers and resettlement workers should be aware of these disparities and related factors. Testing, care, education and consistent follow-up should be provided.